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/*

 *  linux/fs/ufs/ufs_inode.c

 *

 * Copyright (C) 1996

 * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)

 * Laboratory for Computer Science Research Computing Facility

 * Rutgers, The State University of New Jersey

 *

 * $Id: ufs_inode.c,v 1.1 2005-12-20 10:26:35 jcastillo Exp $

 *

 */

#include <linux/fs.h>

#include <linux/ufs_fs.h>

#include <linux/sched.h>

extern struct inode_operations ufs_file_inode_operations;

extern struct inode_operations ufs_dir_inode_operations;

extern struct inode_operations ufs_symlink_inode_operations;

extern struct file_operations ufs_file_operations;

extern struct file_operations ufs_dir_operations;

extern struct file_operations ufs_symlink_operations;

void ufs_print_inode(struct inode * inode)

{

        printk("ino %lu  mode 0%6.6o  lk %d  uid %d  gid %d  sz %lu  blks %lu  cnt %lu\n",

               inode->i_ino, inode->i_mode, inode->i_nlink, inode->i_uid, inode->i_gid, inode->i_size, inode->i_blocks, inode->i_count);

        printk("  db <0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x>\n",

               inode->u.ufs_i.ui_db[0], inode->u.ufs_i.ui_db[1],

               inode->u.ufs_i.ui_db[2], inode->u.ufs_i.ui_db[3],

               inode->u.ufs_i.ui_db[4], inode->u.ufs_i.ui_db[5],

               inode->u.ufs_i.ui_db[6], inode->u.ufs_i.ui_db[7],

               inode->u.ufs_i.ui_db[8], inode->u.ufs_i.ui_db[9],

               inode->u.ufs_i.ui_db[10], inode->u.ufs_i.ui_db[11]);

        printk("  gen 0x%8.8x ib <0x%x 0x%x 0x%x>\n",

               inode->u.ufs_i.ui_gen, inode->u.ufs_i.ui_ib[0],

               inode->u.ufs_i.ui_ib[1], inode->u.ufs_i.ui_ib[2]);

}

/* XXX - ufs_read_inode is a mess */

void ufs_read_inode(struct inode * inode)

{

        struct super_block * sb;

        struct ufs_inode * ufsip;

        struct buffer_head * bh;

        sb = inode->i_sb;

        if (ufs_ino_ok(inode)) {

                printk("ufs_read_inode: bad inum %lu", inode->i_ino);

                return;

        }

#if 0

        printk("ufs_read_inode: ino %lu  cg %u  cgino %u  ipg %u  inopb %u\n",

               inode->i_ino, ufs_ino2cg(inode),

               (inode->i_ino%sb->u.ufs_sb.s_inopb),

               sb->u.ufs_sb.s_ipg, sb->u.ufs_sb.s_inopb);

#endif

        bh = bread(inode->i_dev,

                   ufs_cgimin(inode->i_sb, ufs_ino2cg(inode)) +

                   (inode->i_ino%sb->u.ufs_sb.s_ipg)/(sb->u.ufs_sb.s_inopb/sb->u.ufs_sb.s_fsfrag),

                   BLOCK_SIZE);

        if (!bh) {

                printk("ufs_read_inode: can't read inode %lu from dev %d/%d",

                       inode->i_ino, MAJOR(inode->i_dev), MINOR(inode->i_dev));

                return;

        }

        ufsip = (struct ufs_inode *)bh->b_data;

        ufsip += (inode->i_ino%(sb->u.ufs_sb.s_inopb/sb->u.ufs_sb.s_fsfrag));

        /*

         * Copy data to the in-core inode.

         */

        inode->i_mode = ufsip->ui_mode;

        inode->i_nlink = ufsip->ui_nlink;

        if (inode->i_nlink == 0) {

                /* XXX */

                printk("ufs_read_inode: zero nlink ino %lu  dev %u/%u\n",

                       inode->i_ino, MAJOR(inode->i_dev), MINOR(inode->i_dev));

                inode->i_nlink = 1;

                printk("ufs_read_inode: fishy ino %lu pblk %lu dev %u/%u\n",

                       inode->i_ino,

                       ufs_cgimin(inode->i_sb, ufs_ino2cg(inode)) +

                       (inode->i_ino%sb->u.ufs_sb.s_ipg)/sb->u.ufs_sb.s_inopb,

                       MAJOR(inode->i_dev), MINOR(inode->i_dev));

        }

        /* XXX - debugging */

        if (ufsip->ui_gen == 0) {

                printk("ufs_read_inode: zero gen ino %lu pblk %lu dev %u/%u\n",

                       inode->i_ino,

                       ufs_cgimin(inode->i_sb, ufs_ino2cg(inode)) +

                       (inode->i_ino%sb->u.ufs_sb.s_ipg)/sb->u.ufs_sb.s_inopb,

                       MAJOR(inode->i_dev), MINOR(inode->i_dev));

        }

        /*

         * Since Linux currently only has 16-bit uid_t and gid_t, we can't

         * really support EFTs.  For the moment, we use 0 as the uid and gid

         * if an inode has a uid or gid that won't fit in 16 bits.  This way

         * random users can't get at these files, since they get dynamically

         * "chown()ed" to root.

         */

        if (ufsip->ui_suid == UFS_USEEFT) {

                /* EFT */

                inode->i_uid = 0;

                printk("ufs_read_inode: EFT uid %u ino %lu dev %u/%u, using %u\n",

                       ufsip->ui_uid, inode->i_ino, MAJOR(inode->i_dev), MINOR(inode->i_dev),

                       inode->i_uid);

        } else {

                inode->i_uid = ufsip->ui_suid;

        }

        if (ufsip->ui_suid == UFS_USEEFT) {

                /* EFT */

                inode->i_uid = 0;

                printk("ufs_read_inode: EFT gid %u ino %lu dev %u/%u, using %u\n",

                       ufsip->ui_gid, inode->i_ino, MAJOR(inode->i_dev), MINOR(inode->i_dev),

                       inode->i_gid);

        } else {

                inode->i_gid = ufsip->ui_sgid;

        }

        /*

         * Linux i_size is 32 bits, so some files on a UFS filesystem may not

         * be readable.  I let people access the first 32 bits worth of them.

         * for the rw code, we may want to mark these inodes as read-only.

         * XXX - bug Linus to make i_size a __u64 instead of a __u32.

         */

        inode->u.ufs_i.ui_size = ((__u64)(ufsip->ui_size.val[0])<<32) | (__u64)(ufsip->ui_size.val[1]);

        inode->i_size = ufsip->ui_size.val[1]; /* XXX - endianity */

        if (ufsip->ui_size.val[0] != 0) {

                inode->i_size = 0xffffffff;

                printk("ufs_read_inode: file too big ino %lu dev %u/%u, faking size\n",

                       inode->i_ino, MAJOR(inode->i_dev), MINOR(inode->i_dev));

        }

        /*

         * Linux doesn't keep tv_usec around in the kernel, so we discard it.

         * XXX - I'm not sure what I should do about writing things.  I may

         * want to keep this data, but for the moment I think I'll just write

         * zeros for these fields when writing out inodes.

         */

        inode->i_atime = ufsip->ui_atime.tv_sec;

        inode->i_mtime = ufsip->ui_mtime.tv_sec;

        inode->i_ctime = ufsip->ui_ctime.tv_sec;

        inode->i_blksize = sb->u.ufs_sb.s_fsize;

        inode->i_blocks = ufsip->ui_blocks;

        inode->i_version = ++event; /* see linux/kernel/sched.c */

        if (S_ISREG(inode->i_mode)) {

                inode->i_op = &ufs_file_inode_operations;

        } else if (S_ISDIR(inode->i_mode)) {

                inode->i_op = &ufs_dir_inode_operations;

        } else if (S_ISLNK(inode->i_mode)) {

                inode->i_op = &ufs_symlink_inode_operations;

        } else if (S_ISCHR(inode->i_mode)) {

                inode->i_op = &chrdev_inode_operations;

        } else if (S_ISBLK(inode->i_mode)) {

                inode->i_op = &blkdev_inode_operations;

        } else if (S_ISFIFO(inode->i_mode)) {

                init_fifo(inode);

        } else {

                printk("ufs_read_inode: unknown file type 0%o ino %lu dev %d/%d\n",

                       inode->i_mode, inode->i_ino, MAJOR(inode->i_dev),

                       MINOR(inode->i_dev));

                /* XXX - debugging */

                ufs_print_inode(inode);

                inode->i_op = &ufs_file_inode_operations;

        }

        /*

         * ufs_read_super makes sure that UFS_NDADDR and UFS_NINDIR are sane.

         */

        if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||

            S_ISLNK(inode->i_mode)) {

                int i;

                for (i = 0; i < UFS_NDADDR; i++) {

                        inode->u.ufs_i.ui_db[i] = ufsip->ui_db[i];

                }

                for (i = 0; i < UFS_NINDIR; i++) {

                        inode->u.ufs_i.ui_ib[i] = ufsip->ui_ib[i];

                }

        }

        if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {

                /* XXX - should be ui_db[1] on little endian ufs filesystems */

                inode->i_rdev = to_kdev_t(ufsip->ui_db[0]);

        }

        /* XXX - implement fast and slow symlinks */

        inode->u.ufs_i.ui_flags = ufsip->ui_flags;

        inode->u.ufs_i.ui_gen = ufsip->ui_gen; /* XXX - is this i_version? */

        inode->u.ufs_i.ui_shadow = ufsip->ui_shadow; /* XXX */

        inode->u.ufs_i.ui_uid = ufsip->ui_uid;

        inode->u.ufs_i.ui_gid = ufsip->ui_gid;

        inode->u.ufs_i.ui_oeftflag = ufsip->ui_oeftflag;

        brelse(bh);

        if (inode->i_sb->u.ufs_sb.s_flags & (UFS_DEBUG|UFS_DEBUG_INODE)) {

                ufs_print_inode(inode);

        }

        return;

}

void ufs_put_inode (struct inode * inode)

{

        if (inode->i_nlink)

                return;

        printk("ufs_put_inode: nlink == 0 for inum %lu on dev %d/%d\n",

               inode->i_ino, MAJOR(inode->i_dev), MINOR(inode->i_dev));

        ufs_print_inode(inode);

        panic("ufs_put_inode: fs is read only, and nlink == 0");

        /* XXX - this code goes here eventually

        inode->i_size = 0;

        if (inode->i_blocks)

                ufs_truncate(inode);

        ufs_free_inode(inode);

        */

        return;

}

/*

 * Local Variables: ***

 * c-indent-level: 8 ***

 * c-continued-statement-offset: 8 ***

 * c-brace-offset: -8 ***

 * c-argdecl-indent: 0 ***

 * c-label-offset: -8 ***

 * End: ***

 */